chemÂ·oÂ·lithÂ·oÂ·auÂ·toÂ·troph. noun. A chemosynthetic organism that obtains energy from the oxidation of inorganic compounds and uses carbon dioxide as its sole source of carbon for growth. Also called chemoautotroph, chemolithotroph.
A soft one based only on phosphoric acid - KWIKSHOT & DEFIANCE. A medium one which is strong but do not give out fumes and suitable for both ferrous and on ferrous metals - HOTPURSUIT ; and. A strong one based on mixture of acids for removal of all kind of scales and rust - PEDIGREE.
Some acids remove rust (oxides), while others cause rust. Most acids will etch metal whether they cause rust or remove it. Phosphoric acid (H3PO4) is one type of acid which removes rust by converting it (iron III oxide) to a form which can be dissolved in water. Most other strong acids cause rust.